Apparatus for compressing air.



H. H. FREY.

PPARATUS FOR GOMPBEBSING AIB. nrmo'rlol FILED June. 1910.

1,001,132 Pat-,enana 11522, 191.1.

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- to, its bore communicating with the interior UNrrnD sfrnfrns' PATENT OFFICE.

HERBERT HVFBE-Y, 0F DETDOIT, MICHIGANl 'APPARATUS ron coirrnnssme uit.

- spammen of Lenen runt. Patent-,ed Aug, 22, HL

Application filed June 9, 1910.V Serial No. 585,955.

To all whom it may concern: i

jle it known that l, :H num-:nr H. Fam', a `citi'lzen 'of the United States, residing at. De-

troit, county of lrVayue. State of Michigan, have invented a certain new und useful Imlirovement in Ap crut is for Compressing Air, and declare t le fo lowing to be a full,

clear, and exact description ofthe same;

such as willenable o'th'ers skilled in the artl to which it pertains to n'dke and 'use the same, reference being had fo. the accompanying drawings, which'form a part of this specification.

My invention .relates to apparatus for compressing airand an ob prrwements is to provide', an improved apparatus for compressing air and one which may ,be vreadily` adapted to an internal combustion' engine without necessitating changes in, or addition' to, the engine. I secure this object'in the device illustrated in 'the accompanying drawing., in which,-

.Figure l1,- is a sectional view of an pppn! ratos embodying my invention, and. so much of a gas engine asiszneeessary toillustru its connectionl therewlth. Fig. 2, is a view similar to Fig. 1, `:showing ai modified form .0f apparatus embodyin? my o a g inventin, i A', indicatesr a part as engine cylm.` der; B, isa pipe` or conduit secured thereof said cylinder.

G, is a'cylinder in which reciprocates\alV piston D; the pipeB communicates with the cylinder-,Gat thez'enter of. its lower end.

"C, is l. pro'ectionjextending upward from the center o the lo`wei end of the cylinder G and having an aperture therethrough communicating with the bore of the pipe B. E, is a stem extending upward from the .center of the piston D.

J, 1s a cylinder coaxial, and communicating', .with the cylinder G and extendi-rllg up er i.

the center the atmosphere and with thepipe B.- c'

Anorzle'and valve, b and a of F of its strokecarrying the piston I* K which opens to the-interior of tbecylinder J and to the bore of the pipe L.' l

M, is un inwardly o ning automatic valve conununicuting wit' thc'atlm here and with the interior of the cylinder and 6@ located at the upper end of said cylinder.

N are apertures throughthegullbof they cylinder'J just aboveI where the'uppor surface of the piston F comes at the lower end of the stroke of said iston. l l H, is ahole exten( ing inward from the lower surface of the iston D at the center I thereof. The walls o? the hole H are adapt -ed to fit loosely over the projection C.

I, is a hole extending inward from the upper surface of the piston F and at the center thereof. the wallsv of 'said holelit loosely over the-pnojcttion K.

' b, Fig. 1, is a nozzle communicating with a, is an automatic ialve a inward in the nozzle b.

The construction of the modified form' shown in Fig. 2', is entirely similar to` that of F1 f. and are united'by an lntegral piece of sma'ller diameter and in Fig. 2, these pistons are united by an integral piece, or rod of apted to open 'larger diameter, and in Fig. 2, cup'lelithers` P and Q are used in connectionrwith 'the 35 pistons F and D to secure a tight joint and 1n1 the former case to serve the purpose of the inlet valve M. In the .deviceof Fig. 2, the lower end of the cylinder G is shown .perforated and a flap valve a is shown 90 covering the perforations and adapted to automatically open inward, this construc-J tion being adapted to take the place of they The operation of the above vice is as follows VVhen a vacuum .is drawn in the cylinder A, in the o Aration of the engine, the pistons F an D are forced tothe lower end of their travel.

Nhen compression takes'place in the cylin- 100 der A the pressure acts upon the lower end of the-piston D 'to force it to the upper endwith it and compressing the air 1n the upper end of the cylinder J- and forcing the same out into 105 the pipe L. 4As the area of the iston D is considerably greater than that the gisten F, a higher degree ojiressurcmay obtained in the cylinder the gas' engine cylinder A.

1, except that in Fig. 1, the piston! D i l. fiiescribed dethan is obtained in n The apertures 11 v'S'Qfatftain' its normal value. i.

e Atl) admit lair to form complete at mosp eric pressure in the cylinder J at the lower end of the strokeof the piston F and alo-,tofpennit .of the exitfof air from the' same wa to-'Ereve'nt a violent contact of the 16 iston l wit f the' upper end of the cylin- When a gas -en 'ne is running light or `rwithoutdongv vox, itis usually throttled 1 down so that 1tv does not receive a charge @2 0 and consequently the pressure on threturn stroke is small, When the apparatue above 'described -israttached to agas engine c vlin- 'drthe 'atmospheric airmay enter through l Atheyalyes aand a to supply this deficien'c i5 enthlt wlin thisdevic'e i used with one cy :inder-of a multi-cylirid .en 'ne, .the compreeion may be Sml in ral of the-other- '.cyli'nders, 1rcept .th one with which this:

`that it will .cation in the presenceof two' witnesses.

apparatus isv llaedfand' inone jL The'eombination of a gas engine cylin.` der Afa cylinder G communicating there' p i a 1,001,1a

than the cylinder (i, a piston iii -they cylinder Y e Projeclivn C extending into the cylinder- G and having an aperture therethrough vcommunicating vwith the bore of vsseid conduit, said piston bein provided with n hole, -the .wa|ls of whic 4nre udupt'ed to -fit loosely over said plojwtion, substantially as and for the purpose described. l

2. The combination of a cylinder apas-A sage formuly a communication between said I cylinder an a c .linder A inwhich com ress|on is to tuk-c nce, a piston in the cylinder G, a second rvinder J 0f less diameter than the cylinder' Gyn piston in the' cylinder J, and. menus for conuectm Saul plstonStm Imssuge communlcutm 'with the outer air pression nppmats, and a non-return vii-Ive .openingr inlwurrl in said. passage.

ocated' `bet\veen the cy mderG land the com- The combination of afcylinde'r 'Gia passage forming: n vcommunication Al'ietween Said: cylm'ler, and u c'vlmder A in which comression is to hike place, a-piston in the cy]- luder G, a second cylinder J of lees` diameter- J, and means for connecting said isto'ns, inlet and 'o'utlet pasqages to said cylinders and a non-return'valve opening `inward into the communication tothe com ression means.

In testimony whereof', sign this specifi fVmcn'rA C. fSrRA'r'r, ELLIOTT .L S'ronnnnn. 

